View Compilation Error

0_0_19000253_27750.cpp: In function 'int main()':
0_0_19000253_27750.cpp:9:23: error: 'N' was not declared in this scope
   for (int i = 0; i < N; ++i) {
                       ^
0_0_19000253_27750.cpp:13:23: error: 'N' was not declared in this scope
   for (int i = 0; i < N; ++i) {
                       ^
0_0_19000253_27750.cpp:16:21: error: 'N' was not declared in this scope
   printf("%.6f\n", (N + 1.0) / sum);
                     ^